<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/youxuan.png" alt="">
        <span>优选电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse? '64px':'200px'">
          <div class="toggle_button" @click="toggleCollapse">|||</div>
           <el-menu background-color="#1e6eb3" text-color="#fff" active-text-color="#ffd04b" :collapse="isCollapse" :collapse-transition="false" unique-opened router :default-active="activePath">
             <!-- 一级菜单 -->
            <el-submenu :index="item.id +''" v-for="item in menulist" :key="item.id">
              <!-- 一级菜单模板区域 -->
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{ item.authName }}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                <template slot="title">
                  <!-- 图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{ subItem.authName }}</span>
                </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 右侧内容区域 -->
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
      </el-container>
</el-container>
</template>

<script>
export default {
   created () {
    //  调用getMenuList()可以拿到左侧菜单数据
     this.getMenuList()
     this.activePath = window.sessionStorage.getItem('activePath')
  },

  data () {
    return {
      // 左侧菜单数据
      menulist:[],
      iconsObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse:false,
      // 被激活的链接地址
      activePath:'',
    }
  },

  methods: {
    //   退出逻辑
    logout(){
        this.$router.push('/login')
        sessionStorage.removeItem('token')
        this.$message.success('退出成功')
    },
    // 获取所有的菜单
    async getMenuList(){
      const res = await this.axios.get('menus')
        if(res.meta.status!==200) return this.$message.error(res.meta.msg);
              this.menulist= res.data
        // console.log(res);
      
    },
    // 
    toggleCollapse(){
      this.isCollapse = ! this.isCollapse
    },
    // 保存链接的激活状态,设置菜单高亮状态
    saveNavState(activePath){
      // 将对应的index存储在本地存储中
      window.sessionStorage.setItem('activePath',activePath)
    }
  }

 
}
</script>

<style lang='less' scoped>
.home_container {
  height: 100%;
}
.el-header {
  background-color: #1e6eb3;
  display: flex;
  justify-content:space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  height: 100px !important;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #1e6eb3;
}
.el-main {
  background-color: #EAEDF1;
}
.el-submenu__title i {
  color:#fff !important;
}
.el-submenu__icon-arrow {
  color: #fff !important;
}
.el-icon-menu {
  color:#fff
}
.el-icon-arrow-down {
  color:#fff
}
.iconfont {
  margin-right: 10px;
}
.el-menu {
  border:none;
}
.toggle_button {
  background-color: #1e6eb3;
  font-size: 10px;
  color: #fff;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}

</style>
